Manifold

Abstract

A manifold may include a pipe, a nut member at an outer circumferential surface of the pipe, and a manifold body including a port having a concave shape extending into the manifold body from an outer surface of the manifold body, wherein a first portion the nut member is inserted into the port, and the manifold body including a locking part protruding on the outer surface and engaging with a second portion of the nut member to prevent the nut member inserted into the port from being rotated and loosened.

What is claimed is: 
     
         1 . A manifold comprising:
 a pipe;   a nut member at an outer circumferential surface of the pipe; and   a manifold body including a port having a concave shape extending into the manifold body from an outer surface of the manifold body, wherein a first portion of the nut member is inserted into the port, and the manifold body including a locking part protruding on the outer surface and engaging with a second portion of the nut member to prevent the nut member inserted into the port from being rotated and loosened.   
     
     
         2 . The manifold of  claim 1 , wherein the locking part includes a wedge protruding from the outer surface. 
     
     
         3 . The manifold of  claim 2 , wherein the wedge is arranged in a circumferential direction of the pipe. 
     
     
         4 . The manifold of  claim 2 , wherein the first portion of the nut member includes a nut fixing part inserted into the port and fixed to the manifold body, wherein the second portion of the nut member includes
 a nut head part positioned outside the port to face the locking part, and   wherein the wedge protrudes toward the nut head part from the outer surface to fix the nut head part.   
     
     
         5 . The manifold of  claim 1 , wherein the manifold body includes:
 a discharge surface defining a manifold fluid passage configured to discharge a fluid through the port; and   a guide surface having a sectional area widened toward outside of the manifold body from the discharge surface.   
     
     
         6 . The manifold of  claim 5 , wherein the pipe includes:
 a pipe body extending in a first direction in which the pipe is inserted into the port, and including the outer circumferential surface of the pipe; and   an inflowing part provided at one end portion of the pipe body and inserted into the port to engage the guide surface.   
     
     
         7 . The manifold of  claim 6 , wherein the inflowing part includes:
 an inflowing surface shaped to correspond to the guide surface; and   a circumferential rib provided in a second direction, the second direction being opposite to the first direction, to protrude radially outward of the pipe body.   
     
     
         8 . The manifold of  claim 7 , wherein the inflowing part includes:
 a support surface extending to have a sectional area widened in the first direction from the outer circumferential surface of the pipe body; and   a circumferential surface recessed radially inward of the pipe body from the circumferential rib to extend toward the support surface in the second direction.   
     
     
         9 . The manifold of  claim 8 , wherein the nut member includes:
 an inner circumferential surface supporting the outer circumferential surface of the pipe body;   a locking surface having a cross-sectional area widened in the first direction from the inner circumferential surface such that the locking surface is locked to the support surface; and   a through surface extending in the first direction from the locking surface such that the inflowing part passes through the through surface.   
     
     
         10 . The manifold of  claim 9 , wherein a height (Nh) of the inner circumferential surface in the first direction is greater than a diameter (D) of the pipe. 
     
     
         11 . The manifold of  claim 1 , wherein a depth (Pd) of the port in a direction in which the nut member is inserted, is greater than a diameter (D) of the pipe. 
     
     
         12 . A manifold comprising:
 a manifold body including a manifold fluid passage and a port formed in a concave shape from an outer surface of the manifold body;   a pipe inserted into the port of the manifold body in a first direction, and including a pipe fluid passage fluidly connected to the manifold fluid passage via the port; and   a nut member inserted into the port and coupled to the manifold body while supporting the pipe,   wherein a diameter (D) of the pipe and a depth (Pd) of the port in the first direction has a ratio) Pd/D (of the depth (Pd) of the port to the diameter (D) of the pipe equal to or greater than 1.3.   
     
     
         13 . The manifold of  claim 12 , wherein the manifold body includes an inner circumferential surface defining the port, and wherein the depth (Pd) of the port in the first direction is a length of the inner circumferential surface in the first direction. 
     
     
         14 . The manifold of  claim 12 , wherein the manifold body includes:
 a discharge surface defining the manifold fluid passage; and   a guide surface having a sectional area widened toward outside of the manifold body from the discharge surface.   
     
     
         15 . The manifold of  claim 14 , wherein the pipe includes:
 a pipe body extending in the first direction, and including an outer circumferential surface; and   an inflowing part provided at one end portion of the pipe body and inserted into the port to the guide surface, and the inflowing part protruding from the outer circumferential surface and radially outward of the pipe body.   
     
     
         16 . The manifold of  claim 15 , wherein the nut member includes an inner circumferential surface configured to support the outer circumferential surface of the pipe body, and
 wherein a height (Nh) of the inner circumferential surface in the first direction and the diameter (D) of the pipe has a ratio) Nh/D (of the height (Nh) of the inner circumferential surface to the diameter (D) of the pipe greater than or equal to 1.5.   
     
     
         17 . A manifold system comprising:
 a manifold body having a first outer surface, a port extending into the manifold body from the first outer surface, the port having a female-threaded portion with a port diameter, a guide surface extending from a bottom surface of the port into the manifold body, the guide surface having a first conical-shape, and a manifold fluid passage extending from the guide surface into the manifold body, a locking part protruding from the first outer surface, the locking part having a group of wedge-shaped features arranged in a circumferential direction adjacent the port;   a pipe having a pipe body with a first outer diameter having an outer circumferential surface, a flange part having a flange part outer diameter larger than the first outer diameter, an flowing part at a distal end of the pipe at the flange part, the flowing part having a second conical-shape configured to mate with the first conical-shape, the flowing part widening to the flange part outer diameter, the flowing part having a pipe hole exit configured to align with the manifold fluid passage when the flowing part of the pipe is engaged with the guide surface of the manifold body such that the pipe is fluidly coupled to the manifold fluid passage; and   a nut member having an inner circumferential surface configured to receive and support the outer circumferential surface of the pipe body therein, the nut member having a male-threaded portion on a first nut outer surface, the male-threaded portion being configured to threadedly engage with the female-threaded portion of the port, the nut member having a nut shoulder extending radially outward from the first nut outer surface, the nut shoulder having a shoulder nut width greater than the port diameter of the port, the nut shoulder having a locking surface configured to face and engage the locking part when the nut member is threadedly engaged with the port.   
     
     
         18 . The system of  claim 17 , wherein the first outer diameter (D) of the pipe and a depth (Pd) of the port has a ratio) Pd/D (of the depth (Pd) of the port to the first outer diameter (D) of the pipe equal to or greater than 1.3. 
     
     
         19 . The system of  claim 18 , wherein a height (Nh) of the inner circumferential surface of the nut member and the first outer diameter (D) of the pipe has a ratio) Nh/D (of the height (Nh) of the inner circumferential surface to the first outer diameter (D) greater than or equal to 1.5. 
     
     
         20 . The system of  claim 19 , wherein the pipe has a circumferential rib extending radially outward from the flange part.